Throttle for carbureters.



A. O. STEWART. THROTTLE FOR GARBURETERS. APPLICATION FILED APR.11,1911,

Patented June 18, 1912 I v/ v if." 1 I 4 are ri.'

Uivrrnears ALFRED C. STEWART, OF LOS ANGELES, CALIFORNIA.

THROTTLE Foa CARBURE'TERS.

To all whom it may concern:

Be it known that I, ALFRED C. STEWART, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Throttle for Carbureters, of which the following is a specification.

This invention relates toV a throttle for,

carbureters particularly designed for use with heavy fuels, and theobj-ect of the, invention is to provide a throttle of such construction that any of the heavier portions of the fuel deposited inthe connections from the carbureter 'to the throttle will be drawn up into the mixtureas it passes the throttle when the engine is running with the Y throttle nearly closed.

throttle chamber and is connected tothe out-- let ot-,a carbureter or means indicated atl 3 for supplying oil andair in definite proportions. bular member adapted for connection with the intake or manifold of an engine, for example,- by Iflange means G. The' throttle M chamber l is preferably annular and is provided with a-tlatbottom), andthe tubu' lar throttle valve member 4 shdes lvertically within the tubular member or outlet portion 3 of the throttle'casing so as to move to and from the Aflat bottom ofthe throttle chamber, the space between this 'tubular throttle valve member and the' bottom ofthe throttle chamber forming an annular passage'for the mixture coming from the cari bureter. The tubular throttle valve member 4 may be operated in any'suitable nia'ntending through an opening in the bottom ing a slot -11'engaginga' pin 12 on said rod.

ner, lforexample, -by means ot a rod S exof the throttle chamber land connected to across bar 9 connected` to and extending transversely -in the tubular throttle member, said rod Sibeingoperated byalever 10 havt Specification of Letters Patent.

Application filed April 1,7, 1911.

The 'outlet means' 3 consists of a tu Patentedtune t8, 1912, serial No. 621,682. I

A spring 13 engages with the said lever l0 and wlth a fixed abutment on the throttle `chamber and tends to move the throttle member t to closed position against the bottom of' the throttle chamber 1, and a controlling means, such as a rod 15, is connected -to said lever l0 to open thethrottle when required.

In the normal operation of the engine. the carbureting. device 5 operates to deliver air and oil or vapor of oil in definite proportions. In case heavy oil is used. however.

the oil will not necessarily be in effective mixture. with the air. tion of the oilwill collect'in the throttle chamber l which is depressed somewhat below` thel connection 2 to the carbureter. so that the oil will accumulate at the bottom lof the throttle chamber by gravity. The throttle valve member el being elevated somewhat above the bottom of the throttlecham- ;t considerable por-.vg

ber in working position, as shown in dotted lines in Fig. 1, the mixture will pass bef-x tween the bottom of the'throttle valve me1nber and the bottom of the throttle chamber and upwardly within the tubular throttle valve member and out through' the'outlet portion 3. Owing to the greater rapidity ot motion of the air where it passes under the edge of the tubular-'throttle valve member 4. a considerable proportion of the oil will be entrained at this point and will llm-.ssalong with the air. This entraining effect ot the air on the oil increases as the tubular throttle valve member 4 is brought closer to .the bottom of the throttle chamber l,

It willv be under-stood that when theren-- gine is ruiming with throttle .wide open there will be but little deposition ot the heavier portion of the oil. but when the throttle 'is nearly closed. such deposition bt comes coi'isiderable and 1t is under these c1rvcumstantes that the inventionis more espe.-

cially operativo', as the approach of the throttle to the bottom of the throttlelehamber increases the velocity vof the mixture where it passes under the throttle 'val-ve.

What I claim is: Y l. A throttle for carlmretersfA comprising a casing formed with a throttle 4chamber having a closed bottom,` and provided with an inlet at one sideloeated above said hottom, said inlet being provided with means i for connection .to the outlet ot a' carbureter, said casing provided with an upwardly extending tubular'out-let, a tubular valve member tocontrol the. passage of mixture between said closed bottom and the interior of .the valve member, said valve member sli l-' mg nud fitting m said tubular outlet to coutinually Shut off direct communication from the throttle chamber tothe outlet.

2. A throttle for ea'rbureters comprising -a casing formed with a throttle chamber having an .inlet at one side provided with means for connection to the outlet of n carburetor, said throttlechamber being provided with a closed bottom located below the level of said inlet to allow condensed oil to collect: on the bottom of said oliambt end said throttlef. chamber being provided with an outlet, a tubular valve member slidably iiiouuted Within tlie casing :met communicating interiorl57 with said outlet, the lower effige of said tubular valve member being movable vertically to and from the bottom not" the throttle elmmber t'o control the passage of mixture betweeirsaitl bottom and the 'interior ot said. tubular valve mem-4 ber, 'and to cause the oil condened on the bottom olt the throttle chamber tojie sucked into the outlet through the val'ee member when the said tubular votre member is in nearly closed posit-ion.

In testimony whereof, l have hereunto set my hand at Los Angeles, California, this 8rd day ot April 1911.

In presence of- ARTHUR P. llNio-H'r,4 FRANK L. GRAHAM. 

